Vulnerability in Canonical Apport
CVE-2020-15702
TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Canonical Apport — versions 2.20.1-0ubuntu2.8, 2.20.1-0ubuntu2, 2.20.1-0ubuntu1
- Canonical Ubuntu Linux — versions 20.04, 18.04, 16.04
Weakness classification (CWE)
Public proof-of-concept exploits
References
- usn.ubuntu.com/4449-1 (Vendor Advisory)
- usn.ubuntu.com/4449-1/ (vendor-advisory, Vendor Advisory)
- www.zerodayinitiative.com/advisories/ZDI-20-979/ (VDB Entry, Third Party Advisory)
- usn.ubuntu.com/4449-2/ (vendor-advisory, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2020-15702?
- CVE-2020-15702 is a high-severity vulnerability in Canonical Apport, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2020-08-06.
- How severe is CVE-2020-15702?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2020-15702 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.